tools/testing/selftests/bpf/progs/test_lookup_and_delete.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_lookup_and_delete.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/progs/test_lookup_and_delete.c- Extension
.c- Size
- 547 bytes
- Lines
- 27
- Domain
- Support Tooling And Documentation
- Bucket
- tools
- Inferred role
- Support Tooling And Documentation: implementation source
- Status
- source implementation candidate
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
vmlinux.hbpf/bpf_helpers.h
Detected Declarations
function bpf_lookup_and_delete_test
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
__u32 set_pid = 0;
__u64 set_key = 0;
__u64 set_value = 0;
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 2);
__type(key, __u64);
__type(value, __u64);
} hash_map SEC(".maps");
SEC("tp/syscalls/sys_enter_getpgid")
int bpf_lookup_and_delete_test(const void *ctx)
{
if (set_pid == bpf_get_current_pid_tgid() >> 32)
bpf_map_update_elem(&hash_map, &set_key, &set_value, BPF_NOEXIST);
return 0;
}
char _license[] SEC("license") = "GPL";
Annotation
- Immediate include surface: `vmlinux.h`, `bpf/bpf_helpers.h`.
- Detected declarations: `function bpf_lookup_and_delete_test`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.